OK, now that we've pretty much exhausted our possibilities for Psionic resistance bonuses, let's look at Regen and HP bonuses.
Regen:
Pounding Slugfest (melee, 2 required)
Scirocco's Dervish (PBAoE, 2 required)
Serendipity (defense, 2 required)
Luck of the Gambler (defense, 2 required)
Triage (healing, 2 required)
Numina's Convalescence (healing, 2 required)
Energy Manipulator (endmod, 3 required)
Efficacy Adaptor (endmod, 4 required)
Kinetic Crash (knockback, 5 required)
Force Feedback (knockback, 4 required)
Annoyance (taunt, 2 required)
Perfect Zinger (taunt, 3 required)
Rectified Reticle (tohit buff, 3 required)
We've already filled our melee attacks, so we don't have anywhere to slot Pounding Slugfest.
Scirocco's Dervish can be slotted in Footstomp, so let's look at that set. As a matter of fact, if you slot all six, you'll get some Psionic defense, but let's just go with the two we need for the regen bonus for now. I picked the Acc/Dam and Dam/End IOs.
Serendipity will fit very nicely into our two slots in Tough Hide. I took the Def and Def/End IOs.
We've already slotted Luck of the Gambler, so we already picked up that bonus.
Triage or Numina's Convalescence will work in Health. Let's go with Numina's Convalescence and slot the Heal and +Regen/+Recovery IOs for a little extra boost to the regen.
Energy Manipulator will work with the three slots we have in Stamina. Now, there are only three IOs in this set, and one of them is a chance to stun. I don't think that'll do anything crazy like hit you with a stun, but let's go with it for now.
Kinetic Crash and Force Feedback could be slotted in Foot Stomp, but they both require a significant number of slots, so we might be better off just skipping these sets.
Now, it may not look like we have anywhere we can put Annoyance or Perfect Zinger IOs to get a bonus, but we could put them in Invincibility. Let's hold on to that idea in case we have room for them later, but not slot them right now.
Rectified Reticle can be slotted in either Invincibility or Rage. Let's hold off on that one for now, too.
So, what powers look like they still need enhancing? Well, your resist passives are empty, so let's go ahead and put something in there. Remember that unique IO in Impervium Armor? Let's go ahead and put one of those in each of the three resist passives. What other fun things can we drop in? Well, there's the Res/+3% Def in Steadfast Protection and Impervious Skin has the 7.5% status resistance (which covers fear effects - another hole in Invuln.) Let's drop each of those into a power and then fill the last hole with the Impervium Res IO to get a little extra recovery in the deal.
In Taunt, we'll just pop a common Taunt IO in place. Alternately, you could put a proc in here if you're feeling like it.
We'll put a Run Speed in Swift.
Now, Invincibility. What do we do with you, old friend? Well, I personally like to put three Hami Cytoskeletons in there (Def/ToHit/End), but it might not be easy to get your hands on those. So, let's look at the option of frankenslotting. Invincibility can benefit from Def, End, Recharge, Taunt, and ToHit, so let's try to hit all of those (well, except for Recharge, anyway.) Starting with Kismet, I'll grab the Def/End and Def/Recharge and pick up another regen boost while we're at it. If we put Adjusted Targeting ToHit and ToHit/End IOs in there, we pick up a 2% damage buff. Now let's slot a common Def IO, and one common Taunt IO.
Let's put the Heal/End Numina IO in Health to get the HP boost.
One common Def in Combat Jumping.
One common Jump in Super Jump.
Let's max Rage and Unstoppable for recharge with three commons each.
And let's finish out Foot Stomp with the rest of Scirocco's set. (You could look to see if there are any other bonuses you want to get from another set here if you'd like.)
And that leaves our last empty slot for a Recharge in Hasten.